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Bug 252986

Summary: IPv6DoD: RFC4193 ipv6_addr_type() doesn't know about RFC4193 addresses
Product: Red Hat Enterprise Linux 5 Reporter: Linda Wang <lwang>
Component: kernelAssignee: Neil Horman <nhorman>
Status: CLOSED DUPLICATE QA Contact: Martin Jenner <mjenner>
Severity: high Docs Contact:
Priority: high    
Version: 5.0CC: dzickus, lwang
Target Milestone: beta   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2007-08-16 13:40:01 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Linda Wang 2007-08-16 13:38:26 UTC 
Description of problem:

ipv6_addr_type() doesn't check for 'Unique Local IPv6 Unicast
Addresses' (RFC4193) and returns IPV6_ADDR_RESERVED for that range.

SCTP uses this function and will fail bind() and connect() calls that
use RFC4193 addresses, SCTP will also ignore inbound connections from
RFC4193 addresses if listening on IPV6_ADDR_ANY.

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:
suggested patch - 
http://thread.gmane.org/gmane.linux.network/67580

===== net/ipv6/addrconf_core.c 1.2 vs edited =====
--- 1.2/net/ipv6/addrconf_core.c	2007-02-26 14:42:57 -05:00
+++ edited/net/ipv6/addrconf_core.c	2007-07-25 15:21:41 -04:00
 <at>  <at>  -50,6 +50,9  <at>  <at> 
 	if ((st & htonl(0xFFC00000)) == htonl(0xFEC00000))
 		return (IPV6_ADDR_SITELOCAL | IPV6_ADDR_UNICAST |
 			IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_SITELOCAL));		/* addr-select 3.1 */
+	if ((st & htonl(0xFE000000)) == htonl(0xFC000000))
+		return (IPV6_ADDR_UNICAST |
+			IPV6_ADDR_SCOPE_TYPE(IPV6_ADDR_SCOPE_GLOBAL));			/* RFC 4193 */

 	if ((addr->s6_addr32[0] | addr->s6_addr32[1]) == 0) {
 		if (addr->s6_addr32[2] == 0) {

-
Comment 1 Linda Wang 2007-08-16 13:40:01 UTC 

*** This bug has been marked as a duplicate of 252264 ***